Work ejector for machine tools



July 22, 1952 E. PRICE WORK EJECTOR, FOR MACHINE TOOLS File'd April 21, 1949 I l l l .l

Zmuentor PALPH E. PR/GE Patented July 22, 15952 ;i 4

j s 12,603,916 WORK EJECTQR FOR MACHINE TooLs Ralph EL Price, Highfield,;Md. assignor to Landis Tool Company, Waynesboro, Pa.

' Application April 21,1949, Serial No; 88,811

relationwith the feeding movement of the mav'clainis. (01. 51 103), Y

to apparatus forejecting chine and which resets itself immediately after remove a'work piece from the the essenbase may be slidably mounted transversely ofthe axis of said wheel on any suitable type of bed member-"Knot shown). Peripherally opposed to grinding wheel H is a control wheel l2. space between the peripheral spaceso'f" said wheels',--a work piece l3 may be'inserted 'ands'upported in 'a manner well known to those skilled in the art ofcenterless grinding.

The means'for effecting transverse movement of wheelbase) consistsof a cylinder 20, a piston 2| -slidably mounted therein, a piston'rod 22 having a threaded portion 23 in operative'engagement with a worm wheel 24 on feedscrew 25. These parts are all supported in wheelbase ID, as shown more in detail in Balsiger et al. Patent 2,419,940, granted May 6, 1947, and my co-pending application Ser. No. 46,280; filed August' 26, 1948, and which-issuedasPatent No. 2,571,610 on October 16, 1951. 1

Said feedscrew 25 is threaded in a nut 26; se-: cured to. said above-mentioned bed member. A hand wheel 30 'is" connected. through suitable. gearing to rotate piston rod 22 with the threaded portion thereof acting as a worm gear instead of a. rack.

The means for supplying the fluid under pressure to cylinder 29 consists of a pump which supplies fluid under pressure through line 36 to valve 31. Said valve directs said fluid alternately through lines 38 and 39 to opposite ends of cylinder 20.

The ejector mechanism consists of an ejector plunger 50 slidably supported in a bracket 5| and held in inoperative position by spring 52, as shown which is attached to plu'ngerill. Said leveris pivoted at 59.

Piston 55 is actuated in one direction byfluid under pressure, preferably air, controlled by a pair of valves 65-and 66 mounted in-tandem in a housingfildivicled-into twoparts by-a partition member 68. Val e 65 has a stem-portion 10in the path of movement of lever 58. Valve 66 also has a stem member ll passing through partition =68into engagement with valve 65. Valve 66 is shifted- -inopposite directions by fiuid under pressure supplied alternately to they right end thereof from line- 38' through line 801 and to the other end of said valve f-rom cylinder- "Zn to which-itis connected by IineBI.

Air 'is supplied to valve 66 through line 90.; With said valve shifted to the right. air is directed,

through line 9| to valve 65; which in turndirects;

it through line 92 to the head end of cylinder'56 In the j "Operation With the parts 7 under pressure is directed from pump 35 through line .35 and'v-alve 31 through line 39 to the head end of cylinder 20. Piston 2| in "cylinder 2llis thus oaused'to move. to the right; "This" move-= ment serves to rotate feedscrew 25, which in turn causes wheelbase l0 and grinding wheel I l{ to move away from the grinding position shown: As piston2l movesto. the right, it uncovers passage-8i through which fluid under pressure iiows to the left :end of valve 66, shifting said valve to the right and connecting air supply line-90 :with line 9|.v .Air flows through line 9|, valve -65 and line formed between the wheels II and I2.

As lever 58 continues to move in a counterclockwise direction, it engages the stem 10 of valve 65, shifting said valve to the right and connecting line 92 with exhaust line 95. With the fluid under pressure in the left end of cylinder 56 thus released, spring 52 returns plunger 50, lever 58 and piston to the starting position so that another work piece may be inserted between wheels II and [2.

In order to return grinding wheel I] to grinding position, valve 31 is shifted to the left to direct fluid under pressure from line 33 through line 38 to the rod end of cylinder 20 and also through line to the right-hand end of valve 86.

in the position shownpfluiot Before wheelbase it) begins to move, valve 66 is shifted to the left to block the flow of air from ,line 90 to line 9 I. During this movement of valve 66, the stem H thereon engages valve 65 shifting it to the left to connect line 9! with line 92 in readiness for the next ejecting operation.

I claim:

1. In a machine tool, a support slidably mounted formovement, toward and from operas tive position, power means for efiecting said movement including a piston and cylinder, a supply of fluid under pressure therefor, a work eject- .ing mechanism and connections between said cylinder and said work ejecting mechanism including a. pressure-operated shut-01f valve" for the" ejector fluid, a second valve for directing said fluid to said ejector, and means responsive-to actuation of said ejector for shifting'said second 2. In a machine 15001;: a support slidably valve to permit resetting of said ejector.

nunted' fcnw cment-toward a 1d-fromopcra-r 'tive position, power means for efiecting sajdi ma en en inclnsina a. pist nandcylinderrasunpig ii-, y nd sin 511 a, rd con e t ons; .betweensaid n inderfand-sald w rk. iect ns mechanism in: I

iid ns a Pres er. op rated a ve having; 00111;

sc nns with ncsite nds of; sa d; cylinder, said valve: actuated? vby being;- actuat d ats t ei be innin f; said hc-.. unnly -0f. fluid for;

t-5i} sa d ii stkme ti nedrew rds; DQ$1-.L, said; i

attach dg Q said: support f or-jmov nsa rinding, J wheel; toward. and iron:- pera e osit on, an; 1 eject ng mechanism f r r moving. a, work-piece;

from the machine, a motor comprising a piston and cylinder for actuatingsa'id ejector, means ractuat nas id eiectormotor, including a pair 7 of; (318 ,11 h-i actuated timcdwelae miwit said is acts ie in. the-'ioppgqs te; ire tion; by; the; movement of? id st-nientmnedvval e,

0.1"? 1 3, the; other 'ofwhich, inc-one direci ionbysaid eiecton andv 4,. In a 1 mach n ptool, a supportslidably un ed fora mov ment toward and firomvopere milepost-tied: relative to. a. Work: piece, a) cutting, sup ort; power meansfforz eiie tin nt including; piston; and cylinder, 1a,

tool; on; sa d midmoweme s nnlyiofwfinid vunder pressuretherefor, a work ejectin mechanism; and; connections; between saidnylindenandsaiaworls eiectingmechanism forincliuatmg; saidimechanism; including a; valve inthe pathofmovementnf said ejector actuatingci means: and operable for first directing: fluid; under.

pressure to. actuate said: ejector and operableby;- said ejgctqr; in response; toe mnvemenil of sa'id ejector in ejecting a work piece, for thereafter directing said fluid to reset said ejector.

5. In a machine tool, a feed mechanism comprising a piston and a cylinder, one of which is attached to a part to be moved, a work ejecting mechanism comprising an ejector rod, resilient means for holding said ejector rod in inoperative position, a piston and cylinder for actuating said ejector rod, against the action of. said" resilient means, means for supplying fluid underpressure to said piston including a valve in substantial axial alignment with said ejector piston, and a ejector ro against the action of said resilient,

means, means for supplying fluid under pressureto said piston;v including a valve. in: substantial r xialal snment said i c crp a s d; valve; alignment with saidfirst mentioned:

valve, connection from said second valve to on:

posite ends of: said, feed cylinder, said second valve in one position being effective to connect thesupply of fluid: under pressurewith said first mentionedvalveand in-anotherposition to cut I 01? said supply of fluid under; pressurewith. said; first mentioned valve, a stem onsaid secondvalve for engaging and shifting said first valve when said second valve is shifteddn one directionby fluid under pressure from, said feed cylinder,

whereby to reset said; valves inpreparation: for;

another actuation-of saidejector;

'7, In a machinestool, a'feed mecnanism aworkejectingmechanism: comprisingan ejector rod,

resilient means for holding, said ejector rod; i -n;

inoperative position, a-piston and cylinder-013, actuating ,said ejector rod; against-the; actioncif said resilient means, means for supplying fluid;

under pressure to said piston including a,- valve in} substantial axial alignment therewith, said valveibeing actuated by movement of said ejector piston; ejecting; a work piece to connect the; mud. line to. saidpiston with an exhaust passage.

E. PRICE.

REFERENCES CITED Koplinretal', V Dec; 5, 1944; 'j 

